This ancient mirror REFLECTS light very well. There is also symbolism of a "luminous" nature:
"The disc of the mirror is a visual metaphor for the sun, shown in the New Kingdom as a horizonatally elongated ovaloid - the rising sun rather than the circular disc of noon."
(From _New Kingdom Remains from Cemeteries R, V, S, and W at Qustul and Cemetery K at Adindan_, by Bruce Beyer Williams, pages 97-98)
Mirror, silver and copper alloy
(From the info card)
"The hairstyle of the nude female figure on the handle of this mirror - thick braids surrounding the face - was popular in the middle of the Eighteenth Dynasty, allowing art historians to date the work."